JPH0223990B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a rotary connector applied to electrical equipment such as a hair dryer.

[Background technology]

FIG. 6 shows a conventional example. That is, connector 7
0 has a pin 71 at the tip and a contact ring 7 in the middle.
2, and a cord 73 is connected to the rear end.
The connector receiver 74 has a pin escape hole 75 in the inner bottom, and has a first connecting fitting 76 that contacts the circumferential surface of the pin 71 and a second connecting fitting 77 that contacts the circumferential surface of the contact ring 72. Even when the connector 70 rotates relative to the connector receiver 74, electrical contact can always be obtained.

However, the connector 70 is
4, the pin 71 may easily hit the first connecting fitting 76 due to the angle at which the pin 71 is inserted, which may deform the first connecting fitting 76 and cause poor contact or shorten its life. There was a drawback.

[Purpose of the invention]

An object of the present invention is to provide a rotary connector that can prevent the first connecting fitting from being deformed by the pin.

[Disclosure of the invention]

The rotary connector of the present invention includes a connector having a protruding pin at the tip and a contact ring provided in the middle, a connector receiver having first and second connecting fittings that contact the circumferential surfaces of the pin and the contact ring, and the connector receiver. and a deformation prevention cover disposed on the opposite side of the contact surface of the first connection fitting, and a tip of the deformation prevention cover and a portion between the pin and the contact ring of the connector are tapered fitted. It is characterized by: Even if the pin is inserted into the connector receiver at an angle, the first connection fitting is protected by the deformation prevention cover. In addition, the tapered fit between the deformation prevention cover and the connector eliminates uneven contact and ensures reliable positioning.

Embodiment A hair dryer to which an embodiment of the present invention is applied will be explained based on FIGS. 1 to 5. First, in FIG. 5, the hair dryer has a cylindrical outer shell formed by housings 1 and 2 that are divided into two parts in the radial direction, a discharge port 3 is formed at the tip, and a heater block 4 is arranged inside the shell. A motor 5 is provided on the windward side of the heater block 4, a fan 6 is provided on the motor shaft provided on the windward side of the motor 5, a suction port 7 is provided on the rear ends of the housings 1 and 2, and a A rotary connector 8 is provided at. That is, when the fan 6 rotates due to the operation of the motor 5, air is sucked through the suction port 7, passes through the motor 5 and the heater block 4, and is discharged from the discharge port 3. 9 is a main switch, 10 is a changeover switch, 11 is a rectifier blade, 12 is a suction ring, 13 is a base, 14 is an attachment/detachment button, 15 is a wiring board, and 16 connects the rotary connector 8 side and the wiring board 15 side. It is a conductive plate.

Now, the rotary connector 8 is fixed to the semi-cylindrical parts 17 and 18 of each housing 1 and 2, as shown in FIG. The semi-cylindrical parts 17 and 18 are the housings 1 and 2.
Each semi-cylindrical part 17, 18 is integrally formed at the rear end part.
An annular groove 20 is formed by a rib 19 on the base side of the inner circumference, a plurality of notch grooves 21 are formed in the axial direction from the tip, and an inward protrusion 22 is formed at the tip.
As shown in FIG. 2, the connector receiver 23 has a collar 24 formed on the outer periphery of the central portion to engage with the annular groove 20.
An insulating partition plate 25 is provided protruding from the center of one end, and terminals 28 and 29 of first and second connecting fittings 26 and 27 are press-fitted and held on both sides partitioned by the insulating partition plate 25. First and second connection fittings 26, 2
7 are substantially U-shaped and arranged in the axial direction on the other end side of the connector receiver 23, and the first connection fitting 26 is closer to the connector receiver 23 than the second connection fitting 27 and is narrower in width. Also, the connector receiver 23
A pin escape hole 30 is formed in the center of the other end side, and first and second deformation prevention covers 31 and 32 are provided.
has been established. The first deformation prevention cover 31 is semi-cylindrical and has a contact surface 26 at the tip of the first connection fitting 26.
The side opposite to a is surrounded by a gap 33 within the elastic deformation of the connecting fitting 26, and its tip is tapered to form a tapered receiving portion 34. The second deformation prevention cover 32 also surrounds the substantially semi-cylindrical second connection fitting 27 with a gap 35 in its elastic deformation. Furthermore, the connector receiver 23 is connected to the connecting fittings 26, 2.
A housing holding portion 3 is located on the outside in the radial direction with respect to 7.
6 and 37 are erected to support the rising portions of the connection fittings 26 and 27 (FIG. 4). One side connector 38
A pin 39 is protruded from the tip, a contact ring 40 is provided at the middle part, a circumferential groove 41 is formed at the rear end, a cord 42 is pulled out from the rear end, and each wire of the cord 42 is internally connected to the pin 39 and the contact ring 40. (not shown). Further, a tapered portion 43 is formed between the pin 39 and the contact ring 40. 44 is a hook hole.

Assembly is as follows. Housing 1, 2
All internal parts such as the motor 5 with fan 6, heater block 4, wiring board 15 with switches 9 and 10 are assembled inside, and the connector receiver 23 is fitted into the semi-cylindrical parts 17 and 18, and the collar 24 is fitted into the annular groove 20. At the same time, the housing holding parts 36 and 37 are held between the semi-cylindrical parts 17 and 18 to combine the two housings 1 and 2. The housings 1 and 2 are assembled by fitting the base 13 on the distal end side, and by locking the middle part with a hook (not shown).
Further, the semi-cylindrical portions 17 and 18 are connected to a fixing ring 45, which will be described later.
However, the thrust direction of the connector receiver 23 is regulated by the flange 24, and the rotational direction is regulated by the housing clamping parts 36, 37, so that the connector receiver 23 is fixed without wobbling. After assembling housings 1 and 2,
Insert the connector 38 into the connector receiver 23 through the semi-cylindrical parts 17 and 18, and insert the pin 39 into the pin relief hole 3.
0, the circumferential groove 41 is engaged with the protrusion 22, and the connector 38 is rotatably attached. At this time, the first connecting fitting 26 comes into contact with the circumferential surface of the pin 39, and the second connecting fitting 27 comes into contact with the circumferential surface of the contact ring 40, resulting in a connected state regardless of the rotational position of the connector 38. Furthermore, when the connector 38 is inserted into the connector receiver 23 at an angle, even if the connector 38 pushes the second connection fitting 27, the second deformation prevention cover 3
2 in elastic deformation, and the pin 39
Even if the connecting fittings 26 are pressed, they are supported by the first deformation prevention cover 31 within elastic deformation,
27 is not plastically deformed. In addition, since the tapered receiving part 34 is formed at the tip of the first deformation prevention cover 31, the pin 39 is guided by the tapered receiving part 34, and insertion is performed smoothly. pin 3 to
9, there is no uneven contact, etc., and positioning is ensured.

A fixing ring 4 is provided on the outer periphery of the cylindrical portions 17 and 18.
5 is fitted and fixed by locking a hook 46 provided at the tip of the fixing ring 45 into a mounting hole 47 formed at the rear end of the housings 1 and 2. Further, the outer surface of the fixing ring 45 has a guide groove 4 in the axial direction.
8, and fixing holes 50 are formed at the inner end of the guide groove 48 via a step 49 so as to be lined up in the circumferential direction. Then, the mounting tube 52 of the filter cover 51 is fitted into the fixing ring 45, and as it rotates, the dowel 53 formed on the inner periphery of the mounting tube 52 passes over the step 49 through the guide groove 48 and engages with the fixing hole 50. Stop. A filter 54 is attached to the filter cover 51 and covers the suction ports 7 of the housings 1 and 2.

With this configuration, the rotary connector can prevent deformation of the connecting fittings 26, 27 due to contact of the connector 38 with the connecting fittings 26, 27 when the connector 38 is inserted by the first and second deformation prevention covers 31, 32. , contact stability and reliability can be ensured. Further, since the connector 38 can be inserted after being assembled into the housings 1 and 2, the internal parts of the housings 1 and 2 can be assembled without disturbing the cords, and since it can be attached and detached, it is convenient for repair, storage, and portability. Further, due to the tapered fit between the first deformation prevention cover 31 and the connector 38, there is no uneven contact between the pin 39 and the first connection fitting 26, and center positioning is ensured.

〔Effect of the invention〕

According to this invention, by providing the deformation prevention cover for the first connection fitting, deformation of the first connection fitting can be prevented, and by tapered fitting the deformation prevention cover and the connector, center positioning can be ensured. , the effect is that the contact stability between the connecting fitting and the pin is good.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view of a hair dryer to which an embodiment of the present invention is applied, Fig. 2 is an exploded perspective view of a rotary connector, Fig. 3 is an exploded perspective view of the rear end of the hair dryer, and Fig. 4 is an exploded perspective view of a rotary connector. FIG. 5 is a sectional view of the rotary connector, FIG. 5 is a sectional view of the hair dryer, and FIG. 6 is a partially broken exploded perspective view of a conventional example. 23...Connector receiver, 26...First connection fitting, 27...Second connection fitting, 31...First deformation prevention cover, 32...Second deformation prevention cover,
34...Taper receiving part, 38...Connector, 39
...Pin, 40...Contact ring, 43...Tapered part.

Claims (1)

[Scope of Claims] 1. A connector having a protruding pin at the tip and a contact ring provided in the middle, a connector receiver having first and second connecting fittings that contact the peripheral surfaces of the pin and the contact ring, and this connector receiver. and a deformation prevention cover disposed on the opposite side of the contact surface of the first connection fitting, and a tip of the deformation prevention cover and a portion between the pin and the contact ring of the connector are tapered fitted. A rotary connector characterized by: 2. The rotary connector according to claim 1, wherein the connector receiver has a deformation prevention cover different from the deformation prevention cover on the side opposite to the contact surface of the second connection fitting.